JPS5820559A - Locking mechanism for opened state of baby carriage - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mechanism for locking a baby carriage in an open state, and more particularly to a locking mechanism capable of automatic locking.

Folding baby carriages require a suitable locking mechanism to ensure their open position.

This locking mechanism is operated only when changing the baby carriage from an open state to a closed state, and is undesirable from a safety point of view unless the eye lock state in which such an operation is not performed is maintained reliably. However, when changing the baby carriage from the closed state to the open state, it is more convenient to lock the baby carriage without any special operation.

Therefore, the main object of the present invention is to provide an open locking mechanism for a baby carriage that can meet the above-mentioned needs.

Simply put, this invention is a locking mechanism using cam means.

Other objects and features of the present invention will become more apparent from the detailed description given below with reference to the drawings.

FIG. 1 is a perspective view of a baby carriage in an open state, in which an embodiment of the present invention is adopted. FIG. 2 is a right side view in the same open state. FIG. 3 is a right side view in the same closed state.

The baby carriage shown here is similar in basic structure to the baby carriage disclosed in Patent No. 33158 of 1982 filed by the same applicant as the present patent application.

The overall configuration of the illustrated baby carriage will be described below, mainly with reference to the drawings showing the baby carriage in the open state.

A grip portion 1 for manually pushing the baby carriage by a person transporting and operating the baby carriage is provided at the upper end of a pair of push rods 2. Also,
The upper ends of the pair of push rods 2 are connected by a push rod connecting rod 4 that can be bent in the direction of arrow 3. The push rod 2 is curved at each of its lower ends, but its straight portion is configured to slide the slide rotation coupling member 5. The front leg 1 is connected to the slide rotation connecting member 5 via a pivot pin 6.
The upper end of 0 is pivoted. The left and right front legs 10 are connected by a front leg connecting rod 11 for reinforcement. The front leg connecting rod 11 is
It can be bent in the direction of arrow 12.

A footrest (not shown) may be attached to the front leg connecting rod 11 so that the feet of an infant placed in the stroller can be placed thereon. A rotatable front wheel 13 is provided at the lower end of front -1'0. lllll114 is connected at the middle portion of the front leg 10 in the longitudinal direction. More specifically, a connecting plate 15 is fixedly attached to the upper end of the rear leg 14, and a pivot pin 16 passing through the end of the connecting plate 15 is attached to the front gii+io, so that the rear leg 14 is connected to the front leg. 10 so as to be rotatable. A rear wheel 17 is rotatably provided at the lower end of the rear 5-leg 14. The left and right rear legs 14 are connected by a rear leg connecting rod 18 for reinforcement. The rear leg connecting rod 18 is bendable in the direction of the arrow 19. One end of a support angle 20 is connected via a pivot pin 21 in a longitudinally intermediate portion of the rear leg 14 so as to be rotatable once.

The lower end of the push rod 2 is rotatably connected to the other end of the support angle 20 via a pivot pin 22.

A front and rear connecting rod 24 is visibly connected to the intermediate portion of the support angle 20 via a pivot pin 23.

The front-rear connecting rod 24 extends in the front-rear direction, and is rotatably connected to the front leg 10 by a pivot pin 25 at a portion where it intersects with the front leg 10. The front and rear connecting rods 24 are connected to the front legs 10
You can work on the part that extends further forward. A central horizontal connecting rod 26 is connected between the left and right front and rear connecting rods 24 . This central horizontal connecting rod 26 can be bent in the direction of arrow 27.

A six-handrail 28, on which a hand 1128 is provided and protrudes forward from the front ll110, is pivoted to the front leg 10 by a pivot pin 29.

6- Next, each part will be explained in more detail.

Both ends of the front leg connecting rod 11 are rotatably supported by a slider 31 via a pivot pin 30. The slider 31 is slidably provided on the front leg 10. A rod link 32 is connected between the slider 31 and the front end of the front and rear connecting rod 24. An arm 34 is rotatably connected to the front leg 10 via a pivot pin 33. The arm 34 and the front leg connecting rod 11 are rotatably connected by a pivot pin 35 located at the tip of the arm 34 and at a predetermined distance from each end of the front leg connecting rod 11.

In such a configuration, when the front end of the front and rear connecting rods 24 rotates upward, the slider 31 slides upward along the front leg 10 via the rod link 32. Accordingly,
Both ends of the front leg connecting rod 11 are pulled upward. As a result, the front leg connecting rod 11 held by the arm 34 via the pivot pin 35 tends to bend in the direction of the arrow 12. This allows the pair of front legs 10 to move closer to each other. In addition, the reverse operation is also similar.
This is achieved via the rod link 32 and slider 31.

FIG. 4 is a perspective view showing a connecting mechanism between the central horizontal connecting rod 26 and the rear leg connecting rod 18.

There is an X between the central horizontal connecting rod 26 and the rear leg connecting rod 18.
A pair of interlocking links 37 which intersect in a letter shape and are mutually pivoted by pivot pins 36 are connected. Each interlocking link 37
It is preferable that the central ram connection rod 26 and the rear leg connection rod 18 be connected by a universal joint.

In the closing operation of the baby carriage, as will become clear from the explanation below, the central horizontal connecting rod 26 and the rear leg connecting rod 18
and move closer to each other.

Therefore, since the interlocking link 37 is stretched, the bending of the central horizontal connecting rod 26 in the direction of arrow 27 and the bending of the rear leg connecting rod 18 in the direction of arrow 19 are interlocked with each other. Conversely, in the opening operation of the baby carriage,
The central horizontal connecting rod 26 and the rear leg 11 connecting rod 18 move away from each other.

Therefore, the interlocking link 37 draws the central horizontal connecting rod 26 and the rear leg connecting rod 18 toward each other.
The center machine connecting rod 26 and the rear leg connecting rod 18 extend in a straight line.

FIG. 5 is a perspective view showing another modification of the coupling mechanism shown in FIG. 4. In this example, instead of the interlocking links 37 intersecting in an X-shape, a pair of interlocking links 38 extending substantially parallel to each other or in a V-shape are used.

It is preferable that the connecting portions between the interlocking link 38, the central lateral connecting rod 26, and the rear leg connecting rod 18 are connected like a universal joint. The interlocking link 38 described here performs the same function as the interlocking link 37 in FIG.
Since the explanation in FIG. 4 described above can be used almost as is, the explanation related to the interlocking link 38 will be omitted.

FIG. 6 is a side view showing the support angle 20 and related structures together with the locking mechanism which is a feature of the present invention. FIG. 7 is a sectional view taken along line 7-7 in FIG. 6.

FIG. 8 is a cross-sectional view taken along line 8--8. FIG. 9 is a sectional view taken along line 9--9 in FIG. 7.

The nine connecting plates 15 receive the upper ends of the rear legs 14 and fix the rear legs 14 with fixing pins 39.

Near the upper end of Ial 1114, a guide elongated hole 40 that extends along the length of Ial 1114 is formed.

An 0-piece pin 41 is inserted into the guide elongated hole 40. The lock bin 41 is movable within the guide elongated hole 4o. The vicinity of the upper end of the support angle 2o in FIG. 6 overlaps with a part of the guide elongated hole 4o, and a notch 42 (as clearly shown in FIG. 12) that coincides with a part of the guide elongated hole 40 is formed here. be done.

As shown in FIG. 7, the spring 41 has a compression spring 43.
It is urged to enter the notch 42 by. An eccentric cam 44 is provided around the lock bin 41 in contact with the side surface of the support angle 20. On the side surface of the support angle 20, there is a protrusion 4 as an action part that comes into contact with the eccentric cam 44.
5 is provided.

An operating knob 46 is provided fixedly connected to the eccentric cam 44.

The state shown in FIGS. 6 to 9 is a locked state. That is, the lock bin 41 fits into the 10-notch 42, the support angle 20 is maintained aligned with the rear leg 14, and the support angle 20 is aligned with the rear leg 14.
It is in a state where it cannot be rotated.

This condition of 1 m is %ill! of the eccentric cam 14! The part is protrusion 45
This is realized when the compression spring 4 is in contact with the
3 pushes the lock pin 41 into the notch 42, and this locked state is maintained.

The operation for releasing this lock will be explained. FIG. 10 shows a portion corresponding to FIG. 6, and shows the state immediately after the lock is released. FIG. 11 shows a part corresponding to FIG. 9, and FIG. 10 shows a state 1 corresponding to FIG. To release the lock, the eccentric cam 44 may be rotated by 180 degrees in either direction via the operating knob 46. Accordingly, the states shown in FIGS. 1.0 and 11 are realized.

Here, a state is realized in which the long diameter portion of the eccentric cam 44 is in contact with the protrusion 45. As a result, the lock pin 41 is moved in a direction in which it escapes from the notch 42 against the elasticity of the compression spring 43. In addition, in order to eliminate instability in which the eccentric cam 44, which is pushed downward by the compression spring 43 via the lock pin 41, reverses itself using the protrusion 45 as a fulcrum, a long diameter portion of the eccentric cam 44 is , a recess 47 for receiving the protrusion 45 (best shown in FIGS. 9 and 11).

) may be formed.

Next, a description will be given of operations directly related to the support angle 20 from when the lock is released until the baby carriage is brought into the closed state as described above. FIG. 12 shows a portion corresponding to FIG. 6, and shows the baby carriage in the middle of opening and closing. In the above-mentioned No. 10Ia, the lock pin 41 is inserted into the notch 4.
2, the support angle 20 can pivot about the pivot pin 21 in the direction of arrow 48. In this manner, as the support angle 20 rotates in the direction of the arrow 48, the protrusion 48 that has been in contact with the long diameter portion of the eccentric cam 44 moves in a direction away from the eccentric cam 44. For example, as shown in FIG. 12, a protrusion 45. When the lock pin 41 is completely separated from the eccentric cam 44, the lock pin 41 moves to the lower end of the guide elongated hole 40 by the action of the compression spring 43.

When the baby carriage is changed from the closed state to the open state, the support angle 20 rotates about the pivot pin 21 in the direction of arrow 48, and the protrusion 45 approaches the eccentric cam 44. At this time,
A guide portion 50 formed on one side of the notch 42 of the support angle 20 may push the lock pin 41 slightly upward as the support angle 20 rotates in the direction of arrow 49. Almost simultaneously with this operation, the protrusion 45 comes into contact with the eccentric cam 44. The rotation of the support angle 20 in the direction of the arrow 49 while the protrusion 45 is in contact with the eccentric cam 44 is performed by the eccentric cam 44.
An attempt is made to forcibly rotate it to the position shown in Figure 6. This is because the lock pin 41, which is the eccentric shaft of the eccentric cam 44, is strongly pushed downward by the compression spring 43, so the lock pin 41 tends to stay at the lower end of the guide elongated hole 40, while the protrusion 45 Support angle 20
By rotating in the direction of arrow 49, the eccentric cam 44 approaches the lock pin 41, and in order to satisfy this relative positional relationship between the two, the eccentric cam 44 rotates and the short diameter portion of This is because the state must be in contact with 45. Therefore, when the support angle 20 is completely aligned with the rear leg 14, it automatically becomes the state shown in FIG. 6, and therefore automatically achieves the locked state.

Figure 1413 is a side view showing how the hand 1128 is attached to the front leg 10. Figure 14 shows hand 11 when the baby carriage is in the closed position.
28 is a side view showing the posture of No. 28. FIG.

Referring to FIG. 13, the handrail 28 is rotatably connected to the front leg 10 by a pivot pin 29. As shown in FIG.

The horizontal posture of this hand 128 in FIG. 13 is maintained by the configuration described below. The rearmost part of the hand 1128 has an engagement I! 51 is formed. On the other hand, the connection plate 15 for the rear leg 14 is engaged with I! An engagement protrusion 52 is formed at the lower end of the engagement protrusion 51 to engage from the rear. Therefore, front leg 10
When the rear legs 14 are in an open state, that is, in an open state of the baby carriage, the engagement protrusion 52 engages with the lower end of the engagement wall 51,
The hand W28 is in a state where it cannot rotate downward about the pivot pin 29. In this way, the hand 112B
4- It is possible to maintain a horizontal position when the stroller is in the open position.

When the baby carriage is in the closed state, as shown in FIG. 14, the rear legs 14 rotate around the pivot pin 16, and the front legs 1
approaches 0. In response to this, the engagement protrusion 52 engages! 51
move away from Therefore, the hand 1128 is in a state where it can rotate downward around the pivot pin 29. Furthermore, the end side [i! 115a moves in the direction of arrow 15b, and comes into contact with the engagement wall 51 at the beginning of one rotation of the rear leg 14, whereby the hand 1
128 may be forcibly rotated downward. At least at the end of the downward rotation of hand 1128,
The hand #128 is placed in an overlapping state with the front leg 10 due to its gravity.

When the baby carriage is changed from the open state to the open state, the state shown in FIG. 14 automatically changes to the state shown in FIG. 13. hand 11
At 28, there is a follower 5 that constitutes a part of a so-called cam device.
3 is formed. A cam [i54] that pairs with the follower 53 is formed on the connection plate 15. Therefore, when the rear leg 14 is rotated relative to the front leg 10 around the pivot pin 16, the cam surface 54 contacts the follower 53 and pushes the follower 53 upward. In response, the hand 1128 is rotated upward about the pivot pin 29. Then, when the handrail 28 approaches the final position of this rotation, the engagement protrusion 52 engages the engagement wall 51, and the thirteenth
The posture of 1,000 W28 as shown in the figure is again realized. At this time, the cam surface 54 remains in contact with the follower 53, and thereby the horizontal posture of the hand 1128 is firmly maintained.

Returning again to FIGS. 1 to 3, there is shown a backrest holding rod 55 for holding the backrest portion of a hammock (not shown) on which an infant is placed. The upper ends of the pair of backrest holding rods 55 are connected by a bendable backrest connecting rod 56. In addition, the seat of the hammock consists of a front and rear connecting rod 24 and a central horizontal connecting rod 26.
It can be attached to the top using these members. The lower end of the backrest holding rod 55 may be attached to the push rod 2 or connected to a tilting adjustment fitting 57, so that its reclining state can be adjusted.

FIG. 15 shows the upper end of the push rod 2, and shows the baby carriage in a locked closed state.

When the baby carriage is in the closed state, the sliding rotation connecting member 5 slides on the push rod 2 and reaches its upper end.

Therefore, if the slide rotation connecting member 5 is locked in this position, the open state of the baby carriage will be locked.

For this locking, an engagement piece 59 is attached to the rear wall 58 of the grip portion 1. The retaining piece 59 is made of a material having appropriate spring properties. An engagement protrusion 61 is formed on the rear wall 60 of the slide rotation coupling member 5 . A portion extending upwardly from this locking projection 61 forms a suitable inclined surface 62. Therefore, when the slide rotation connecting member 5 slides upward on the push rod 2, the engaging piece 59
Guided by 2.

Then, when the engaging piece 59 passes over the inclined surface 62, the engaging piece 59 automatically engages with the engaging protrusion 61. When it is desired to release this lock 17-, the engagement piece 59 can be forcibly deformed rearward.

Next, the opening/closing operation and operation of this baby carriage will be explained. In the open state of the baby carriage, the support angle 20 is aligned with the rear legs 14 and locked by a locking mechanism including a lock bin 41.

To move from the open state to the open state as described above, first, the sixth
As explained in FIG. 11, the operating knob 46 is rotated 180 degrees to release the lock. Next, by holding the grip portion 1 and lifting the entire baby carriage off the ground, the support angle 20 rotates in the direction of arrow 48 (FIG. 10). Next, while keeping the rear wheels 17 on the ground, the entire baby carriage is tilted backwards so that the front wheels 13 are lifted off the ground, and the grip portion 1 is pushed downward. If the downward pushing force of the grip portion 1 is applied via the operating portion 63 provided at the center of the push rod connecting rod 4, the push rod connecting rod 4 is advantageously bent in the direction of the arrow 3. As this operation progresses, the push rod 2 is brought to the lower position 18-, and the slide rotation connecting member 5 slides upward on the push rod 2. In response, the front and rear connecting rods 24 rotate so that their front ends face upward, and the slider 31 slides upward on the front leg 10.

Accordingly, the front leg connecting rod 11 is bent in the direction of the arrow 12. In response to this bending of the front leg connecting rod 11, the pair of front legs 10 move closer to each other. Also, at almost the same time, the pair of push rods 2 approached each other, and the rear of the pair 11914
They approach each other, and the rear leg 1g14 approaches the front leg 10. As a result, the rear leg connecting rod 18 and the central lateral connecting rod 26 come closer together and are bent in the directions of arrows 19 and 27, respectively. Then, the hand 1128 falls down along the front leg 10 as the engagement between the engagement wall 51 and the engagement protrusion 52 is released. Eventually, as shown in No. 3 IlI, the front legs 111110 are lined up substantially parallel to the push rod 2, and the rear legs 14 are also aligned with the push rod 2.
They are essentially parallel to each other. Then, the left and right members approach each other. In this way, a closed position is obtained, which is locked by the locking mechanism shown in FIG. In the state shown in FIG. 3, the two front wheels 13 and the rear wheel 17 of 211 are brought to almost the same height, so this baby carriage can stand on its own in the closed state.

To change the state from the closed state to the open state, first, the engagement of the engagement piece 59 with the engagement protrusion 61 is released. Next, the operation section 63
and lift the entire baby carriage into the air. Accordingly,
The weight of the baby carriage acts, and the support angle 20 rotates around the pivot pin 22 at the lower end of the push rod 2. At the same time, the slide rotation connecting member 5 slides downward on the push rod 2. In response to these, the front bale connecting rod 24 is rotated so as to be in a substantially horizontal state. Accordingly, the front leg connecting rod 11 extends left and right, and the pair of front legs 10 are pushed into each other. Also, at almost the same time, the rear leg 14 moved to the front 11110
Rotate away from. Accordingly, by the action of the interlocking link 37 (or 38), the rear leg connecting rod 18 and the middle vermilion horizontal connecting rod 26 are interlocked to extend left and right.

With this operation, the pair of push rods 2, the pair of rear legs 14, and the pair of front and rear connecting rods 24 move so as to spread in the width direction. Then, the operations from FIG. 12 to FIG. 6 proceed and the lock is applied. Further, the handrail 28 is placed in a horizontal state, and this state is maintained by the engagement protrusion 52. In this way, an open position of the baby carriage is achieved and it is automatically locked in this open position.

FIG. 16 is a perspective view of another example of a baby carriage in an open state, in which the embodiment of the present invention is adopted. FIG. 17 is a side view of the right side Il in the same open state. FIG. 18 is a side view also in the open state.

The basic structure of the baby carriage shown here is disclosed in Patent Application No. 30800 filed in 1982 by the same applicant as this patent application.
similar to that disclosed in . This baby carriage and
A major difference from the above-mentioned baby carriage is that this baby carriage does not shrink in the width direction in the closed state. Therefore, the configuration of the baby carriage is simplified accordingly. The structure and operation of this baby carriage will become clear by explaining only the relevant parts.

21- First, the push rod 2 and the push rod connecting rod 4 are made of an integral material. In this connection, both the backrest holding rod 55 and the backrest connecting rod 56 are made of an integral material. Front leg connecting rod 1
1 is constituted by an integral rod. In addition, the rear leg connecting rod 18 is also constituted by an integral rod. therefore,
The slider 31, rod link 32, arm 34, etc. are not provided.

The central horizontal connecting rods 26 are disposed at the front and rear of the front and rear connecting rods 24, respectively, and are constituted by an integral rod. Furthermore, footrest 6
4 is attached to the lower end of the front leg 10.

In FIGS. 16 to 18, only the operating knob 46 is shown.
Although shown in the figure as constituting a locking mechanism that is a feature of the present invention, the configuration of this locking mechanism is similar to that of the embodiment described above.

Therefore, the operation for releasing the lock and the operation for automatically locking are the same as those in the above-mentioned embodiment, and therefore, the explanation thereof will be omitted.

As described above, according to the present invention, the locking mechanism is advantageously realized using a cam device. This locking device must be operated reliably to change the stroller from an open state to a closed state, but it is configured to automatically lock when the baby carriage is changed from a closed state to an open state. ing. Therefore, it is very convenient to use and is also preferable from the viewpoint of safety.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a baby carriage in an open state, in which an embodiment of the present invention is adopted. FIG. 2 is a right side view in the same open state. FIG. 3 is a right side view (m) in the same closed state. FIG. 4 is a perspective view showing a mechanism for connecting the central horizontal connecting rod 26 and the rear leg connecting rod 18. FIG. 5 is a perspective view showing another modification of the connection mechanism of the 4th figure. FIG. 6 is a side view showing the support angle 20 and related structures together with the locking mechanism which is a feature of the present invention. FIG. 7 is a sectional view taken along line 7-7 in FIG. 6. FIG. 8 is a sectional view taken along line $18-8 in FIG. 6. FIG. 9 is a cross-sectional view taken along line 9--9 of FIG. 17. FIG. 10 shows a portion corresponding to FIG. 6, and shows the state immediately after the lock is released. FIG. 11 shows a part corresponding to FIG. 9, and FIG. 10 shows a corresponding part. FIG. 12 shows a portion corresponding to FIG. 6, and shows the baby carriage in the middle of opening and closing. 13th
The figure is a side view showing how the handrail 28 is attached to the front leg 10. FIG. 14 is a side view showing the posture of the hand 1128 when the baby carriage is in the closed state. FIG. 15 shows the upper end of the push rod 2, and shows the baby carriage in its closed and locked state. 16th
The figure is a perspective view of another example of a baby carriage in an open state, in which an embodiment of the present invention is adopted. FIG. 17 is a right side view in the same open state. FIG. 18 is a right side view in the same closed state. In the figure, 2 is a push rod, 5 is a slide rotation connecting member, 1
0 is the front leg, 14 is the intrusion leg, 15 is the connecting plate, 20 is the support angle, 24 is the front leg connecting rod, 40 is the guide elongated hole, 4
1 is a lock pin, 42 is a notch, 43 is a compression spring, 44 is an eccentric cam, 45 is a protrusion serving as an operating portion, 46 is an operating knob, and 47 is a recess.

Claims (3)

[Claims] (1) A pair of front legs extending forward and downward, and a pair of front legs rotatably connected to each of the front legs at the upper end thereof.
a pair of rear legs extending rearward and downward; a pair of support angles rotatably connected at one end to a side surface of each central portion of each of the rear legs; and each other end of each of the support angles. a pair of push rods rotatably connected at the lower ends of the respective front legs; and an upper end of each of the front legs is slidable relative to the push rods;
and a slide rotation connecting member that rotatably connects each other, and a pair of front and rear connecting rods that operatively connects each of the front legs and each of the support angles, and the support angles and the rear legs are in an aligned state. An open state locking mechanism for a folding baby stroller that is in an open state when A lock pin is movably inserted into the support angle, and the vicinity of the other end of the support angle is aligned with a part of the guide elongated hole, and a notch is formed here that corresponds to a part of the guide elongated hole, and the lock pin is movably inserted into the lock pin. is biased by a spring so as to fit into the notch, an eccentric cam is provided around the lock pin in contact with a side surface of the support angle, and an action portion in contact with the center cam is provided on the 11th surface of the support angle. When the acting portion and the short diameter portion of the eccentric cam come into contact with each other, the lock pin enters the notch and the alignment state of the support angle and the rear leg is maintained and the open state of the baby carriage is locked. When the action part and the long diameter part of the eccentric cam come into contact, the lock pin comes out of the notch and the support angle becomes rotatable relative to the rear leg, allowing the stroller to close. State locking mechanism. (2) The open state locking mechanism for a baby carriage according to claim 1, wherein an operating knob is provided fixedly to the eccentric cam. (3) A concave portion for receiving the acting portion is formed in the major diameter portion of the center cam, as claimed in claim 1 or 2.
The open state locking mechanism of the baby carriage described in .